Here's a list of all the Enemy Skills if you don't have time to link to the other sites.

Frog Song: Learned from Touch Me (Gongada Area).
Effect: Causes a single target to suffer sleep and frog statuses.

L4. Suicide: Learned from Mu (Chocobo Ranch Area).
Effect: Causes critical damage and inflicts the mini status on all enemies if their levels are a multiple of 4.

Magic Hammer: Learned from Razor Weed (Wutai Area).
Effect: Reduces a single target’s MP by 100.

White Wind: Learned from Zemzelett (Junon Area). You need to manipulate it.
Effect: Cures all status effects and heals all allies HP an equal amount to that of the user.

Big Guard: Learned from Beach Plug (Gongada Beach). You need to manipulate it.
Effect: Uses Barrier, MBarrier, and Haste on all allies.

Angel Whisper: Learned from Pollensalta (Northern Crater). You need to manipulate her.
Effect: Revives, restores up to 7,000 HP and removes all status effects from a single ally.

Dragon Force: Learned from Blue Dragon (Inside Gaea's Cliff). You need to manipulate it.
Effect: Doubles a single target's Defence and Magic Defence.

Death Force: Learned from Adamantaimai (Wutai Beach). You need to manipulate it.
Effect: Makes a single target immune to Sudden Death.

Flame Thrower: Learned from Ark Dragon (Mythril Mines).
Effect: Causes medium Fire damage to a single opponent.

Laser: Learned from a Death Claw (Corel Desert Prison).
Effect: Halves a single target's HP.

Matra Magic: Learned from Custom Sweeper (Midgar Area).
Effect: Causes minor non-elemental damage to all enemies.

Bad Breath: Learned from Marlboro (Gaea's Cliff Area).
Effect: Inflicts confusion, frog, mini, poison, silence, and sleep on all opponents.

Beta: Learned from Midgar Zolom (Chocobo Ranch Area).
Effect: Causes medium Fire damage to all enemies.

Aqualung: Learned from Harpy (Gold Saucer Area).
Effect: Causes medium Water damage to all enemies.

Trine: Learned from Materia Keeper (Mt. Nibel).
Effect: Causes medium Lightning damage to all enemies.

Magic Breath: Learned from Stilva (Inside Gaea's Cliff).
Effect: Causes major Fire/Ice/Lightning damage to all opponents.

????: Learned from Jersey (Shinra Mansion, Nibelheim).
Effect: Causes non-elemental damage to a single enemy equal to the user's maximum HP divided by their current HP.

Goblin Punch: Learned from Goblin (Goblin Island).
Effect: Causes non-elemental damage to a single enemy.

Chocobuckle: Learned from a Chocobo (Any Chocobo track). You need to cast L4 Suicide on it after feeding it a Mimett Green.
Effect: Causes non-elemental damage to a single enemy. The amount of damage depends on the number of times your party has fled from battle.

L5 Death: Learned from Parasite (Northern Crater).
Effect: Causes Sudden Death to all enemies if their levels are a multiple of 5.

Death Sentence: Learned from Gi Spectator (Cave of the Gi, Cosmo Canyon).
Effect: Causes a single target to have a 60 second countdown before Death is cast on them.

Roulette: Learned from Death Dealer (Northern Crater).
Effect: Casts Death on a random opponent or ally.

Shadow Flare: Learned from Ultimate WEAPON (Cosmo Canyon) or Dragon Zombie (Northern Crater).
Effect: Causes severe non-elemental damage to a single target. The attack completely ignores the targets defences.

Pandora's Box: Learned from Dragon Zombie (Northern Crater).
Effect: Causes severe non-elemental damage to all enemies.